As far as compression algorithms go, DNS' algorithm is ridiculously simple. Switching compression algorithms wouldn't improve security. At best it'd be a latera

As far as compression algorithms go, DNS' algorithm is ridiculously simple. Switching compression algorithms wouldn't improve security. At best it'd be a lateral move; more likely it'd be a net security loss. We would likely get better compression, though. If the response is that people would just reuse pre-existing compression libraries, the exact same thing could be said here. In fact, Unix systems provide `dn_expand` and `dn_comp` in libc (e.g. BSDs, Linux/glibc, Linux/musl) or another system library (e.g. -lresolv on Solaris). And of course nginx could have used one of countless other DNS libraries, such as libunbound.